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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.clustercontroller.core.testutils;
import com.yahoo.vdslib.state.ClusterState;
import com.yahoo.vdslib.state.Node;
import com.yahoo.vdslib.state.NodeType;
import com.yahoo.vespa.clustercontroller.core.AnnotatedClusterState;
import com.yahoo.vespa.clustercontroller.core.ClusterStateBundle;
import com.yahoo.vespa.clustercontroller.core.DummyVdsNode;
import com.yahoo.vespa.clustercontroller.core.FleetController;
import com.yahoo.vespa.clustercontroller.core.listeners.SystemStateListener;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Objects;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* @author Haakon Humberset
*/
public interface WaitCondition {
/** Return null if met, why not if it is not met. */
String isConditionMet();
abstract class StateWait implements WaitCondition {
private final Object monitor;
protected ClusterState currentState;
ClusterState convergedState;
private final SystemStateListener listener = new SystemStateListener() {
@Override
public void handleNewPublishedState(ClusterStateBundle state) {
synchronized (monitor) {
currentState = state.getBaselineClusterState();
monitor.notifyAll();
}
}
@Override
public void handleStateConvergedInCluster(ClusterStateBundle states) {
synchronized (monitor) {
currentState = convergedState = states.getBaselineClusterState();
monitor.notifyAll();
}
}
};
protected StateWait(FleetController fc, Object monitor) {
this.monitor = monitor;
synchronized (this.monitor) {
fc.addSystemStateListener(listener);
}
}
ClusterState getCurrentState() {
synchronized (monitor) {
return currentState;
}
}
}
class RegexStateMatcher extends StateWait {
private final Pattern pattern;
private Collection<DummyVdsNode> nodesToCheck = Set.of();
private ClusterState lastCheckedState;
private boolean checkAllSpaces = false;
private Set<String> checkSpaceSubset = Set.of();
RegexStateMatcher(String regex, FleetController fc, Object monitor) {
super(fc, monitor);
pattern = Pattern.compile(regex);
}
RegexStateMatcher includeNotifyingNodes(Collection<DummyVdsNode> nodes) {
Objects.requireNonNull(nodes, "nodes must be non-null");
nodesToCheck = nodes;
return this;
}
RegexStateMatcher checkAllSpaces(boolean checkAllSpaces) {
this.checkAllSpaces = checkAllSpaces;
return this;
}
RegexStateMatcher checkSpaceSubset(Set<String> spaces) {
Objects.requireNonNull(spaces, "spaces must be non-null");
this.checkSpaceSubset = spaces;
return this;
}
private static List<ClusterState> statesInBundle(ClusterStateBundle bundle) {
List<ClusterState> states = new ArrayList<>(3);
states.add(bundle.getBaselineClusterState());
bundle.getDerivedBucketSpaceStates().forEach((space, state) -> states.add(state.getClusterState()));
return states;
}
@Override
public String isConditionMet() {
if (convergedState == null) return "No cluster state defined yet";
lastCheckedState = convergedState;
Matcher m = pattern.matcher(lastCheckedState.toString());
if (!m.matches() && checkSpaceSubset.isEmpty()) return "Cluster state mismatch";
for (DummyVdsNode node : nodesToCheck) {
if (node.getClusterState() == null) return "Node " + node + " has not received a cluster state yet";
boolean match;
if (checkAllSpaces) {
match = statesInBundle(node.getClusterStateBundle()).stream()
.allMatch(state -> pattern
.matcher(withoutTimestamps(state.toString()))
.matches());
} else if (!checkSpaceSubset.isEmpty()) {
match = checkSpaceSubset.stream().allMatch(space -> {
String state = node.getClusterStateBundle().getDerivedBucketSpaceStates()
.getOrDefault(space, AnnotatedClusterState.emptyState()).getClusterState().toString();
return pattern.matcher(withoutTimestamps(state)).matches();
});
} else {
match = pattern.matcher(withoutTimestamps(node.getClusterState().toString())).matches();
}
if (!match) {
return "Node " + node + " state mismatch.\n wanted: " + pattern + "\n is: " + node.getClusterStateBundle().toString();
}
if (!node.hasPendingGetNodeStateRequest()) {
return "Node " + node + " has not received another get node state request yet";
}
}
return null;
}
/** Returns the given state string with timestamps removed */
private String withoutTimestamps(String state) {
String[] parts = state.split(" ");
StringBuilder b = new StringBuilder();
for (String part : parts) {
if ( ! part.contains(".t"))
b.append(part).append(" ");
}
if (b.length() > 0)
b.setLength(b.length() - 1);
return b.toString();
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("RegexStateMatcher:")
.append("\n wanted: '").append(pattern.pattern()).append("'")
.append("\n last checked: '").append(lastCheckedState).append("'")
.append("\n current: '").append(currentState).append("'");
return sb.toString();
}
}
class InitProgressPassedMatcher extends StateWait {
private final Node node;
private final double minProgress;
InitProgressPassedMatcher(Node n, double minProgress, FleetController fc, Object monitor) {
super(fc, monitor);
this.node = n;
this.minProgress = minProgress;
}
@Override
public String isConditionMet() {
if (currentState == null) {
return "No cluster state defined yet";
}
double currentProgress = currentState.getNodeState(node).getInitProgress();
if (currentProgress < minProgress) {
return "Current progress of node " + node + " at " + currentProgress + " is less than wanted progress of " + minProgress;
}
return null;
}
@Override
public String toString() {
return "InitProgressPassedMatcher(" + node + ", " + minProgress + ")";
}
}
class MinUsedBitsMatcher extends StateWait {
private final int bitCount;
private final int nodeCount;
MinUsedBitsMatcher(int bitCount, int nodeCount, FleetController fc, Object monitor) {
super(fc, monitor);
this.bitCount = bitCount;
this.nodeCount = nodeCount;
}
@Override
public String isConditionMet() {
if (currentState == null) {
return "No cluster state defined yet";
}
int nodebitcount = 0;
for (NodeType type : NodeType.getTypes()) {
int nodeCount = currentState.getNodeCount(type);
for (int i=0; i<nodeCount; ++i) {
if (currentState.getNodeState(new Node(type, i)).getMinUsedBits() == bitCount) {
++nodebitcount;
}
}
}
if (nodebitcount == nodeCount) return null;
return "Currently, " + nodebitcount + " and not " + nodeCount + " nodes have " + bitCount + " min bits used set";
}
@Override
public String toString() { return "MinUsedBitsMatcher(" + bitCount + ", " + nodeCount + ")"; }
}
}
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